Investigation of behavior rhythm of wintering birds is useful in understanding the strategy of birds living through hard winter environment by adjusting behavior and time budget. Until now,most relevant researches were focused on large water birds. Compared with large birds,small birds spend more energy during thermoregulation,and this may result in different diurnal rhythms. In this study,spotted redshank( Tringa erythropus),a common small water bird in Poyang Lake was selected to investigated its time bud...
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